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501-1733
SPARCstation 10 motherboard
Up to two Mbus modules. 16.6/20MHz (model 20) or 18/20MHz SBus.
SPARCstation 10 motherboards come in three fab versions, 270-1733-12 and
270-1733-13 (501-1733/2259/2274), and 270-1733-14 (501-2365), each with minor
layout differences from the others. Additionally, the 501-2274 part for the
model 20 is clocked at a different speed.
From left to right, the rear edge of the board has: ISDN NT and TE connectors;
a parallel/audio/AUI Ethernet connector; a keyboard connector; a serial port
connector (ports A and B in the same connector); a 10BaseT Ethernet
connector; and a 50-pin SCSI-2 connector.
Connector pinouts and form factors are not known.
Memory is in the form of up to eight 16M (501-1785 or 501-2273) or 64M
(501-1930) 70ns SIMMs. They must be installed in the order shown:
Nearest SBus connectors
J201 --------------------- (1) 0x00000000-0x03FFFFFF
J202 --------------------- (8) 0x10000000-0x13FFFFFF
J203 --------------------- (3) 0x04000000-0x07FFFFFF
J301 --------------------- (6) 0x14000000-0x17FFFFFF
J302 --------------------- (4) 0x08000000-0x0BFFFFFF
J303 --------------------- (5) 0x18000000-0x1BFFFFFF
J304 --------------------- (2) 0x0C000000-0x0FFFFFFF
J305 --------------------- (7) 0x1C000000-0x1FFFFFFF
This would appear to mean that when using 16M SIMMs, memory is not physically
contiguous, and that 16M and 64M SIMMs can be installed in any mixture.
There are a variety of jumpers. All locations are given with component side
up and connector side toward you.
J0801 (3-pin jumper in near center, pin 1 to left)
1-2 RS-232 (+12V)
2-3 RS-423
J0802 (3-pin jumper in near center, pin 1 to left)
1-2 RS-232 (-12V)
2-3 RS-423
J1101 (single jumper in near left corner)
Jump to enable 100-ohm ISDN TE termination JUMPED
J1102 (single jumper in near left corner)
Jump to enable 100-ohm ISDN TE termination JUMPED
J1401
270-1733-12: (single jumper in near left)
Jump to select 66MHz (model 20)/72 MHz clock JUMPED
270-1733-13: (3-pin jumper in near left, pin 1 to right)
1-2 Select 80MHz clock
2-3 Select 66MHz (model 20)/72MHz clock JUMPED
J1402 (8-pin block in rightish center)
JTAG test point UNJUMPED
J1403 (3-pin jumper in near center, pin 1 to left)(270-1733-12 only)
1-2 Select 66MHz (model 20)/72MHz clock JUMPED
2-3 Select 80MHz clock
J1404 (3-pin jumper in near center, pin 1 nearest)(270-1733-12 only)
1-2 Select 66MHz (model 20)/72MHz clock JUMPED
2-3 Select 80MHz clock
J1601 (single jumper in middle right edge)
GND test point
J1602 (single jumper in farish right edge)
GND test point
J1603 (single jumper in near right)
GND test point
J1604 (single jumper in middle near edge)
GND test point
J1703 (block in rightish near edge)
1-2 manufacturing jumper - mousei UNJUMPED
3-4 manufacturing jumper - kbdi UNJUMPED
5-6 manufacturing jumper - kbdo UNJUMPED
7-8 manufacturing jumper - edgeon UNJUMPED
9-10 manufacturing jumper - ptxdb UNJUMPED
11-12 manufacturing jumper - prxdb UNJUMPED
13-14 manufacturing jumper - ptxda UNJUMPED
15-16 manufacturing jumper - prxda UNJUMPED
17-18 manufacturing jumper - tpe<0> UNJUMPED
19-20 manufacturing jumper - tpe<1> UNJUMPED
21-22 manufacturing jumper - tpe<2> UNJUMPED
23-24 manufacturing jumper - tpe<3> UNJUMPED
Additional features of interest: the boot PROM is in the near right at
location U1005. The NVRAM/TOD/ID chip is beyond the boot PROM, at location
U1004. The power connector is in the far left corner and the floppy and
internal SCSI connector is in the far right corner. The speaker fuse F1302,
Ethernet fuse F1301, and keyboard fuse F0801 are in a row along the middle
near edge. The SCSI fuse F1502 is in the far right corner near the SCSI
connector. The +12V fuse F1501 is in the middle left edge. All fuses are
nonreplaceable PTC devices. In the nearish left is a large square chip, the
MSI. For 270-1733-12 and -13, it may be either 100-2905-02 (L1A6396) or
100-2905-03 (L1B7596). For 270-1733-14, it is always 100-2905-03 (L1B7596).
Note that the 270-1733-14 fab has BABT approval for ISDN and X.25 use in the
UK.
Note that boot PROM version 2.12 is required to install two 501-2358 SM40 Mbus
modules.
Note that when adding a second Mbus module, any internal disk drives with PTC
protection should have the TERMPWR option disabled. Otherwise, the power
supply overcurrent protection may be tripped when powering up.
Note that the GT and ZX options are not supported on boards with MSI
100-2905-02 (LSI Logic L1A6396). They are only supported on board with MSI
100-2905-03 (LSI Logic L1B7596).
When installing internal SCSI disk drives, disable the TERMPWR option. SCSI
bus TERMPWR is grounded on internal cable 530-1874-02. If TERMPWR is not
disabled on drives with PTC protection, the power supply overcurrent
protection may be tripped when powering up. If TERMPWR is not disabled on
drives with fuse protection, the fuses will blow. TERMPWR on the internal
SCSI bus is not connected to TERMPWR on the external SCSI bus. Additionally,
the inner surface of the SS10 chassis is conductive, so drives must be
mounted with insulating hardware.
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Last modified: 2000.12.07.22.07.20 CST
Server time: 2012.02.09.19.31.53 GMT